- Author:
- Pettitt,J.M.
- Year:
- 1969
- Title:
- Heterospory and the Rise of the seed Habit.
- Reference:
- Pettitt,J.M. (1969) Heterospory and the Rise of the seed Habit. International Botanical Congress, 11th, Abstracts of Papers, Seattle,Washington P. 168- 168
- Google Academy:
- try to search by title in english
| Genus | Species | Country(Region) | From | To |
|---|---|---|---|---|
| Archaeosperma | Archaeosperma arnoldii | Nd | Famennian | |
| Cystosporites | Cystosporites | Nd | Famennian | |
| Cystosporites | Cystosporites | Nd | Tournaisian | |
| Cystosporites | Cystosporites devonicus | Nd | Frasnian |